Indium tin oxide (ITO) is one of the few materials, which combines optical transparency in the wavelength range of visible light and electrical conductivity. It offers a wide range of applications in...

In the production process of microelectronic devices and high efficiency solar cells, local openings in thin dielectric layers are required. Instead of photolithographic, laser based processing enables...

The defect-free laser-assisted structuring of thin films on flexible substrates is a challenge for laser methods. However, solving this problem exhibits an outstanding potential for a pioneering development...

The optimization of laser scribing for the interconnection of CIGS solar cells is a current focus of laser process development. In addition to the geometry of the laser scribes the impact of the laser...

Confined laser ablation with ultra-short laser pulses, also referred to as laser “lift-off”, is initiated at the interface of transparent thin films and underlying absorbing substrates. The energy per...

The machining of highly filled abrasive polymer plastics in injection molding processes determines high resistant tools in the industrial production. One of the most important points is a long durability...

The interest using ultra-short pulsed laser systems for industrial applications increased remarkably as reliable high power systems with average power exceeding several 10W became available, facilitating...

Short periodic nanostructures with periods much smaller than the laser wavelength (1/10-1/2 λ) are fabricated on semiconductors after femtosecond laser irradiation. Laser polarization is an important...

The use of a helicaloptics to drill micro holes in fuel injectors and spinning nozzles has already demonstrated great advantages likehigh precision and flexibility. Due to the laser beam rotation on...

Alloying of surface layers could be recently improved by using the laser deep alloying process. For this, a highly focused laser beam is guided on the material surface producing a wide and deep melt...

Polycrystalline diamond (PCD) has become an indispensable tool material for efficient machining of various materials. In manufacturing of PCD tools the finishing process in order to obtain the required...

We have studied a solid-state laser modification of the surface of PbX semiconductor films under processes of self-organization for conditions when photon energies are above the band gap of the semiconductor....

Titanium and its alloys are important biomedical materials. It is known that the surface texture of implanted medical devices affects cell response. Control of cell response has the potential to enhance...

Laser cutting of CFRP lightweight parts has the advantages of a contact-free, automatable and flexible processing for a prospective series production. For the development of strategies for laser cutting...

Carbon fiber reinforced plastics (CFRP) show high potential for use in lightweight applications not only in aircraft design, but also in the automotive or wind energy industry. However, processing of...

Numerical Simulation of laser beam cutting of carbon fiber reinforced plastic (CFRP) is performed. It is important to understand the mechanism about generation of heat-affected zone (HAZ) in order to...

Lightweight construction is a major trend in the automotive industry. Theconnection of fibre reinforced plastics with aluminium is consequently seen as promising prospect. In this regard, thermal joining...

In the automotive industry the increasing environmental awareness is reflected through consistent lightweight construction. Especially the use of carbon fiber reinforced thermoplastics (CFRTP) plays...

Laser transmission welding can be used to join endless fibre reinforced thermoplastics. The welding temperature is affected by the heat conduction along carbon fibresand depends on the local orientation...

Laser transmission welding is a well-known joining technology for thermoplastics. Because of the needs of lightweight, cost effective and green production nowadays injection molded parts usually have...

Laser machining has great potential regarding automation in fabrication of CFRP (carbon-fiber-reinforced plastics) parts, due to the nearly force and tool-wear free processing at high process speeds....

Monitoring of laser processes has been researched actively since the 1980's in several institutes around the world. The goal of process monitoring is to gather information on the process and to improve...

The article presents principles and results of development of multisensory monitoring system based on optical emission registration in the visible and infrared range. Coaxial photodiode sensors embedded...

A known phenomenon during laser welding of thin sheets is the deformation caused by thermally induced stresses. This deformation can result in a change of the gap width between the welded parts, which...

The occurrence of thermally induced focal shifts in high power solid state laser cutting applications has been reported. A fraction of laser light is absorbed in transmissive optical elements and at...

We present an experimental study of the deep penetration laser welding process which aims to analyze the plasma plume oscillations on a short time scale. Using the high-speed camera we show that the...

The keyhole is the crucial factor for an appropriate weld seam in laser metal welding. The stability of the keyhole is governed by multiple hydrodynamic effects such as melt flow, evaporation on the...

Process control for laser-material-processing requires access to characteristic features which qualify the operating-point of the process. For laser-based manufacturing-processes, this can either be...

Structuring of multilayer stacks with ns-laser pulses is widely used in the industrial production of LEDs. These stacks are built up from several different materials each one layered upon each other....

Nowadays thermal forming processes of steel are state of the art in industrial applications. Nevertheless, the influences of thermal induced phase-transformation on residual stresses and strength have...

The proposal of this work is analysis the energy density of both solutions of nonlinear Schrödinger equation (NLS), spatial and temporal solutions and show that in some cases the correspondent energy...

Safety considerations in the field of laser radiation have traditionally been restricted to maximum permissible exposure levels defined as a function of wavelength and exposure duration. But in Europe...

Beside the total laser power, the laser beam diameter is a significant factor for the resistance of laser protection filters to laser radiation. In this paper a study of the resistance of laser protection...

Modern laser beam sources provide radiation with high output power and brilliance. Additionally, innovative laser system technology enables the deflection of the laser into every direction. These developments...

In the laser forming (LF) process, laser induced temperature distribution within the work-piece is of paramount importance. Through control of process parameters and depending on work-piece geometry,...

Precipitation hardenable aluminum alloys are some of the most important lightweight materials. However, their range of applications in comparison to conventional deep drawing steels is limited by the...

Most small or medium sized parts produced in mass production are made by shearing and forming of sheet metal. This technology is cost effective, but the achievable quality and geometrical complexity...